server
   -> endpoint
         -> transport




server
- parent of endpoint, so inheirits all of endpoint


endpoint
- can create connections
- knows types
-- endpoint
-- connection
-- endpoint transport
-- connection transport


endpoint transport
- knows types
-- endpoint transport
-- connection transport

- has endpoint specific transport state
-- acceptor
-- io_service


connection
- knows connection type

connection transport
- has connection specific transport state
-- socket


#######################
# Initialization Loop #
#######################

Endpoint Construction Phase (every step here happens in reverse)
- role constructor
- endpoint constructor
-- sets useragent and is_server
- transport endpoint constructor
-- ASIO: set external_io_service false
-- ASIO: state: uninitialized
- socket endpoint constructor

Endpoint Initialization Phase
- set handlers (optional)
- set on_tls_init (required for use of transport::asio::tls_socket::endpoint)
- Server needs no initialization?
- Endpoint needs no initialization?
- ASIO: call to transport::endpoint::init_asio
-- creates (or sets) the io_service
-- sets external_io_service
-- initializes acceptor
-- sets state to ready
- IOSTREAM: register_ostream
- SERVER ASIO: listen(...)
-- sets state to listening
-- opens acceptor
-- sets some acceptor options
-- binds the acceptor
-- starts listening
- SERVER ASIO: start_accept
-- will create a new connection
-- will queue up async_accept on that connection's socket
-- when the socket is accepted or an error occurs, the connection will either be
   started or terminated. Afterwards a new accept operation is initiated.
- SERVER ASIO: start io_service
-- If using the internal io_service this typically means run()
-- If using an external io_service you are free to run it however you like or
   perform the above steps using an already running io_service.


Connection Initialization Phase

###############


create a server
call any transport init required by the transport you are using
call server->start_accept();



start_accept
- Create a new connection
- Ask transport




#############################
# Endpoint API (Thread Safe #
#############################


##################
# Connection API #
##################
send message